Bitcoin is no doubt risky investment, but it depends on people, bitcoin is opportunity to some and challenge to some. I think you should not borrow money to buy bitcoin.
Undoubtedly one of the best advise one can give to a prospective investor, Borrowing money to invest in Bitcoin i think is not a good idea also, its advisable to invest what you can afford to lose.
I totally agree with I don't think borrowing money to invest in a risky investement is a good idea bitcoin needs to be delt with carefully yet it is now one of the most profitable investment.